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World Save Failure

The server cannot save the world because the disk is full. 'No space left on device' halts saving and risks corruption, freeing space is urgent.

What does this error mean?
Saving writes chunk, player, and level data to disk. 'No space left on device' means the drive is full, so writes fail. Continuing to run in this state risks corrupting the world on the next save attempt. 
java.io.IOException: No space left on device
Most Common Causes
  • The disk or volume is genuinely full.
  • Backups or logs consuming all free space.
  • A runaway log file growing without bound.
  • Other applications filling the drive.
  • A small disk quota on a hosting plan.
How To Diagnose
  1. Run 'df -h' to confirm the disk is full.
  2. Find large files/folders with 'du -sh *' in the server directory.
  3. Check the size of logs and backups.
  4. Note your host's storage quota if applicable.
Recommended Fixes
  • Free disk space
    Delete or move old backups, large logs, and unneeded files, then save and restart.
  • Rotate/trim logs
    Clear or rotate oversized log files and enable log rotation.
  • Move backups off-disk
    Store backups on separate storage so they do not fill the server drive.
  • Upgrade storage
    If the disk is simply too small, increase the storage allocation.
Analyze My Log
Frequently Asked Questions

Maybe not yet, but stop the server to avoid a failed save corrupting it, free space first.

Usually accumulated backups and unrotated log files.

Run 'df -h' for the volume and 'du -sh *' to find what is using it.